SU1163392A1 - High-intensity gaseous-discharge lamp - Google Patents

Abstract

A GAS-DISCHARGE HIGH-INTENSITY LAMP, containing a quartz glass flask, at opposite ends of which, using cylindrical foil plates of current leads, consisting of a cylindrical, crimped hollow quartz insert, crimped on the side surface, inside a layer of a substrate. The gas absorber is located, connected with the internal cavity of the bulb on the side of the electrodes, mounted on electrically attached to it and to the cylinder of foil wire current leads, so that the end of the electrode and the liner there is a gap, characterized in that, in order to increase reliability in operation and simplify production, it is equipped with a ring of refractory metal mounted on an axial projection made in the insert, with hole at the end and consisting of the end of the electrode.

Description

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The invention relates to gas discharge lamps and can be used in the manufacture of gas lamps of continuous and pulsed radiation of high intensity, having cylindrical foil current leads.

The purpose of the invention is to increase the reliability of the lamp in operation and simplify manufacture.

FIG. 1 shows the proposed lamp; in fig. 2 is a section A-A in FIG. one; in fig. 3 - electrode unit of the proposed lamp before welding in the leg; in fig. L - section bb in fig. 3

The gas discharge of the high-intensity lamp contains a quartz flask 1, in the legs 2 of which there are current leads containing a hollow quartz cylindrical insert 3 with an axial protrusion 4, ending with a hole and surrounded by a ring 3 of molybdenum. In the cavity of the liner 3, the granules of the getter 6 are exchanged, for example, from pressed and sintered titanium powder. Between the side walls of the liner 3 and the legs 2 are hermetically sealed, the cylinder 7 is made of molybdenum foil, which is divided by diametrically opposite slits 8 into two half-cylinders 9 and 10, along the longitudinal edges of which molybdenum wires 11-14 are welded. where the electrode 15 is fixed on them by welding the electrode 15 so that between its end and the protrusion 4 with the ring 5 there is a gap of 3-5 mm in size. The wires 13 and 14 are extended outside the current lead and soldered to the outer terminal 16 of the lamp. The lamp supply current from pin 16 passes through the wire 14, then along the current lead-in circumference along the foil semi-cylinder 10 to the wire 12, and through it to the electric 15. The second parallel current path is from the output 16 through the wire 13 to the cylinder 9 to the wire 11, and it to the electrode 15. In the case of lamps of extremely high power, the number of such parallel parts of the foil can be increased, for example, to three by a corresponding increase in the number of slots 8 in the cylinder 7 and the number of wire leads.

When making such a construction, the insert 3 with the getter 6 is filled with argon, then the protrusion 4 is sealed off from the vacuum system, so that its wall thickness decreases to the edge to about 1 mm. A ring 5 is mounted on the protrusion 4, for example using vacuum cement. Such a structure makes it possible to observe the end of the protrusion 4 during formation in the last opening. Further, the electrode assembly is assembled and sealed in the leg 2 in a known manner. The assembled legs 2 weld the OCA with the flask 1, which is pumped out, after which the ring 5 is heated by a high-frequency inductor with a concentrator to a temperature of about, with the result that the end of the protrusion is softened and under the pressure of argon in the cavity. breaks to form a hole. This process is easily monitored visually since the protrusion 4 with the ring 5 is not closed to be viewed from outside the lamp by other parts. The lamp is then pumped out, filled with working gas and sealed.

Thus, the proposed design provides a greater reliability of the lamp, since it allows objective control of the presence of a hole in the insert, which eliminates the possibility of transferring the lamp to the lamp, insulated from the volume of the lamp, i.e. with insufficient operational reliability. The formation of a hole in the insert is carried out under continuous visual inspection, which is not possible with known lamps. Therefore, the manufacture of the lamp is simplified and takes less time. The direct connection of the gas absorber with the gas filling of the lamp, along with the increase in the absorbing surface of a large amount of gas absorber, which is in an inert environment during welding and therefore retains a high sorption capacity, creates conditions for increasing the durability of the lamps.

FIG. I

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FIG, C

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Claims (1)

A GAS DISCHARGE HIGH-INTENSITY LAMP containing a quartz glass flask, at the opposite ends of which with the help of cylindrical foil current leads, consisting of a cylindrical hollow quartz liner pressed across an open cylinder from a foil, at least one of the current leads a getter is located, communicating with the inner cavity of the bulb on the side of the electrodes, mounted on an electrically connected to it and to the cylinder of foil pr wire current leads, so that between the end of the electrode and the liner there is a gap, characterized in that, in order to increase reliability and simplify manufacturing, it is equipped with a ring of refractory metal mounted on an axial protrusion made in the liner, with an opening at the end and consisting of from the end of the electrode.